Pakistani officials say a suicide bomber has rammed an explosive-laden van into a police station, killing four people. Investigators say at least two police officers and a child are among those killed.

Authorities say about two dozen people were wounded in the Saturday blast in Karak, a town located in North West Frontier province near the Afghan border, about 150 kilometers southeast of Peshawar.

A local police chief and witnesses say the bombing took place near the main gate of the police station.